<!doctype html>
<html>
  <head>
    <meta http-equiv='Content-Type' content='text/html; charset=utf-8'>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js" charset="utf-8"></script>
    <script type="text/javascript" src="D3TreeSample.js"></script>
    <style>
      .link {
      fill: none;
      stroke: #ccc;
      stroke-width: 2.5px;
      }
   </style>
  </head>
  <body>
    <div id="viz"></div>
  </body>
</html>
